Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:36:02 2012 Optimize a model with 14015 rows, 4160 columns and 45886 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.42s Presolved: 14013 rows, 4158 columns, 45448 nonzeros Variable types: 0 continuous, 4158 integer (4158 binary) Found heuristic solution: objective 64.0000000 Root relaxation: objective 2.000000e+00, 3218 iterations, 0.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 128 64.00000 2.00000 96.9% - 0s H 0 0 50.0000000 2.00000 96.0% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 305 5.00000 2.66667 46.7% - 2s H 0 0 4.0000000 2.66667 33.3% - 2s 0 0 2.67760 0 3754 4.00000 2.67760 33.1% - 3s 0 0 2.67760 0 3742 4.00000 2.67760 33.1% - 5s 0 0 2.67760 0 3732 4.00000 2.67760 33.1% - 5s 0 0 2.67760 0 3746 4.00000 2.67760 33.1% - 6s 0 0 2.67760 0 3534 4.00000 2.67760 33.1% - 8s 0 0 2.67760 0 3327 4.00000 2.67760 33.1% - 11s 0 0 2.67760 0 3422 4.00000 2.67760 33.1% - 12s 0 0 2.67760 0 3316 4.00000 2.67760 33.1% - 14s 0 0 2.67760 0 3331 4.00000 2.67760 33.1% - 15s 0 0 2.67760 0 3295 4.00000 2.67760 33.1% - 16s 0 0 2.67760 0 3259 4.00000 2.67760 33.1% - 17s 0 0 2.67760 0 3262 4.00000 2.67760 33.1% - 19s 0 0 2.67760 0 3262 4.00000 2.67760 33.1% - 19s 0 1 3.00000 0 3262 4.00000 3.00000 25.0% - 23s Cutting planes: Clique: 175 Zero half: 4 Explored 8 nodes (45278 simplex iterations) in 24.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%